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Engine wiring harness

Tiny
CARL ENLOE
  • MEMBER
  • 1994 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 100,000 MILES
I have got a tub 350, I rebuilt it. Can I splice in to the tub wires to run wires to the fuel rail eight injectors?
Sunday, April 15th, 2018 AT 2:32 PM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Do you not have power to the injectors? What is the issue that is causing you to do this procedure?

Roy
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Monday, April 16th, 2018 AT 4:46 AM
Tiny
CARL ENLOE
  • MEMBER
  • 4 POSTS
I put a 1959 body on a 1994 frame an installing ever thing on that Chevrolet and wanted to change to TPI.
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Tuesday, April 17th, 2018 AT 1:25 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, to power the injectors you need a twelve volt feed from the fuse box to the injectors. It should only be hot with the key on.

Do not tap into anything. Run it right from the fuse box.

Roy
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Tuesday, April 17th, 2018 AT 1:30 PM
Tiny
CARL ENLOE
  • MEMBER
  • 4 POSTS
Could I toe into the old ton wires an that give me enough fuel pressure?
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Tuesday, April 17th, 2018 AT 1:35 PM
Tiny
CARL ENLOE
  • MEMBER
  • 4 POSTS
Tbi
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Tuesday, April 17th, 2018 AT 1:36 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
For a tuned port you need more than 9 lbs of pressure. You need upwards of 40-50 lbs. You can use the existing wiring from the truck for the fuel pump. That already had a relay for the fuel pump.

Roy
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Tuesday, April 17th, 2018 AT 1:39 PM

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